Elements
What is a pure substance
H20
What is water.
when two or more substances are combined
What is an mixture
a way of listing the elements
What is the periodic table
Helium, neon, argon, krypton, xenon, and radon are what
What is a noble gas.
An important number in an element
What is an atomic number.
C6H12O6
What is sugar
mixture of elements that has the characteristic of a metal.
What is an alloy.
From left to right elements are lined up in rows based on their what?
What is the atomic number
These elements have just 1 electron in the outer shell of their atom and are very reactive.
What is an Alkali metal.
Atoms can come in different forms
What is a gas, solid, or liquid
NaCl
What is salt
a mixture where very small particles of one substance are evenly distributed throughout another substance.
What is an colloid
Each horizontal row in the table
What is a period
The group contains very reactive nonmetal elements.
What is a halogen
There are this many elements.
What is 118 elements.
C2H6O
What is alcohol
mixture between a liquid and particles of a solid.
What is an suspension
the columns of the periodic table
What is a group.
Group 2A
What is a alkaline earth metal
This many, naturally exist on Earth.
What is 94.
N20
What is nitrogen.
mixture where one of the substances dissolves in the other
What is an solution
he periodic table was proposed by Russian chemist
Who is Dmitri Mendeleev
group 8A
What is noble gas.